Defaulting to user installation because normal site-packages is not writeable
Looking in indexes: http://pypi.douban.com/simple
Requirement already satisfied: matplotlib in /home/qkb/.local/lib/python3.8/site-packages (3.5.1)
Requirement already satisfied: packaging>=20.0 in /home/qkb/.local/lib/python3.8/site-packages (from matplotlib) (21.3)
Requirement already satisfied: python-dateutil>=2.7 in /home/qkb/.local/lib/python3.8/site-packages (from matplotlib) (2.8.2)
Requirement already satisfied: pillow>=6.2.0 in /home/qkb/.local/lib/python3.8/site-packages (from matplotlib) (8.4.0)
Requirement already satisfied: kiwisolver>=1.0.1 in /home/qkb/.local/lib/python3.8/site-packages (from matplotlib) (1.3.2)
Requirement already satisfied: cycler>=0.10 in /home/qkb/.local/lib/python3.8/site-packages (from matplotlib) (0.11.0)
Requirement already satisfied: fonttools>=4.22.0 in /home/qkb/.local/lib/python3.8/site-packages (from matplotlib) (4.28.3)
Requirement already satisfied: numpy>=1.17 in /home/qkb/.local/lib/python3.8/site-packages (from matplotlib) (1.21.4)
Requirement already satisfied: pyparsing>=2.2.1 in /home/qkb/.local/lib/python3.8/site-packages (from matplotlib) (3.0.6)
Requirement already satisfied: six>=1.5 in /home/qkb/.local/lib/python3.8/site-packages (from python-dateutil>=2.7->matplotlib) (1.16.0)
